In the first day, she encounters three girls, Asagi, Fuuka, and Ena. They are the daughters in the neighboring Ayase family. Yotsuba's new life began.
Yotsuba is interested in everything near her. For example, in the first day, she is interested in a cicada and,,,,she pretended cicada by climbed to a utility pole. You can see how strange she is,,,right? kkk She is interested in everything, really. Actually, she doesn't know many things a child who is in her age are expected to know. For example, she doesn't know escalators, air conditioners, a playground's swing, and so on.